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Patented May I6, |899. S. L. KNEASS.

I N J E CT 0R (Application filed Nav. 99, 1898.)

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No. 625,267. Patented May I6, |899. S. L. KNEASS.

INJEGTUR.

(Application led Nov. 29, 1898.)

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Patanted May I6, |899. S. L. KNEASS.

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(Application med Nov. 89, 189B.)

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UNITED STATES PATENT OFFICE.

STRIOKLANI) L. KNEASS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE lVILLIAM SELLERS d; COMPANY, INCORPORATED, OF SAllllC PLACE.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 625,267, dated May 16, 1899.

Application led November 29, 1893. Serial No. 697.788. (Model.)

To (LH Inh-0171.' it may] concern:

Be it known that I, STRICKLAND L. KNEnss, of the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Injectors, of which the following is a specification.

My invention is applicable to that class of injectors in which the actuating-steam is divided into two or more jets. Of this class 1o there are two divisions, in one of which there is a lifting apparatus provided with a steamnozzle, a converging combining-tube, and a diverging delivery-tube Which discharges the fluid into a conduit which delivers it to the receiving end of the converging combiningtubc of the forcing apparatus, which is provided With like parts to those of the lifting apparatus and which discharges its fluid into a conduit which carries it to the boiler. In

2o the other division there is a lifting apparatus provided with a steam-nozzle and a converging combining-tube, but no diverging delivery-tube. The forcing apparatus is provided with a steam-nozzle, aconverging combiningtube, and a diverging delivery-tube. The Huid from the combining-tube of the lifting apparatus is delivered directly into the receiving end of the forcing combining-tube, where it receives a fresh impulse from the 3o steam-nozzle of this apparatus, which carries it through the delivery-tube to the conduit which delivers it to the boiler-that is to say, one division has a double jet, While the other division has a single jet with a double impulse to produce a continuous acceleration of this jet, and my invention is applicable to both. In all steam-jet apparatus Where the converging jet is provided with a lateral outlet the jet is more sensitive to external pressure, the larger its diameter at such outlet compared with that of the actuating steamjet, and in the double-jet and double-impulse injectors this point is the rearmost lateral opening of the lifting apparatus. In all such steam-jet apparatus when the temperature of the Water-supply is raised, so that the jet Will produce a side pressure upon the walls of the combining-tubes if there are lateral openings in these Walls, spill or overflow will first occur 5o at that opening nearest the delivery-tube of the forcing apparatus, and if these openings are in a closed chamber the pressure upon that one farthest from this delivery-tubethat is, the rearmost lateral opening of the lifting apparatus-will interrupt the action of the apparatus. Therefore to utilize the highest temperature of Water-supply there must be no communication between these openings; but under ordinary conditions of Water-supply temperature the rearmost lat- 6o eral opening of the lifting apparatus may overflow, and if the overiow can reach the opening nearest the delivery-tube of the forcing apparatus the jet at this point would absorb this overfiow, and thereby increase the capacity of the injector.

It is one Object of my invention, therefore, to provide communication between all of the lateral openings to the jets of such doublejet and double-impulse apparatus. 7o

It is a further object to guard the rearmost lateral opening of the converging jet of the lifting apparatus against pressure which may be produced at the opening near Where the converging jet begins to diverge, and it is a further object to make this communication and this separation at will, and it is afurther object to make this communication and this separation automatic.

To these ends my improvement consistsin So a cha-mberwhich incloses the rearmost lateral opening to the converging jet of the lifting apparatus from the chamber which incloses the lateral openings to the converging jet of the forcing apparatus. 8 5

It further consists in a chamber which incloses the rearmost lateral opening to the converging jet of the lifting apparatus from the chamber which incloses the lateral openings to the converging jet of the forcing appara- 9o tus, with means for closing the outlet from the chamber which incloses the lateral openings of the forcing apparatus.

It further consists in an outlet through a side of the chamber which incloses the rearmost lateral opening to the converging jet of the lifting apparatus to the chamber which incloses the lateral openings of the forcing apparatusmhich outlet may be closed at will; and it further consists in a valve in the outloo let of the chamber which incloses the rearmost lateral opening to the converging jet of the lifting apparatus, which valve opens outwardly under pressure within this chamber and which closes under pressure within the chamber which incloses the lateral openings of the forcing apparatus.

I designate as forward parts in relation to each other in the direction of the motion of the jet, and real-most is in the opposite direction to forward.

In the drawings which accompany and form part of this specification the same letters refer to similar parts.

The casing of the injector' is designated by A, the pipe forthe admission of steam is connected to the branch ll, while C is the watersupply branch, D is the branch for the boiler feed-pipo, and E is the waste-pipe.

Figures 1 and S are longitudinal sections of injectors, of which the actuating steam-jets are in the same axial line. Fig. 2 isasimilar section of part of the injector shown in Fig. l, with hand closing-valve in place of automatic. Fig. 3 is a transverse section upon the line V V in Figs. l and Fig. Llis alongitudinal section of a double-jet injector to which my invention is applied. Fig. 5 is a similar section on the line X X of Fig. 1. Fig. is a section on theline Y Y. Fig. 7 is an outside view of the injector shown in Fig. S.

o'. is the steam-nozzle of the forcing apparatus, and h the steam-nozzle of the lifting apparatus.

c is part of the lifting combining tube which extends to the end of the steam-nozzle o, and (Z (l from the end of the steam-nozzle a is the forcing combining-tube.

Fisalateral opening of the lifting combining-tube c forward of its receiving end contained in the chamber L, and F' is a lateral opening of the forcing combining-tube CZ d forward of its receiving end and contained in the chamber L', comm nnication between the two chambers being controlled by the handoperated valve Il (shown in Fig. 2) or by the automatically-acting valve II in Figs. l, l, (i, and 8.

F" is a lateral opening in the forcing combining-tube to make the instrument capable of restarting automatically; but forthe object of this invention it may be neglected, as the pressure tending to break the jet when the supply-water is at too high a temperature is produced by the final opening between the combining-tube and the delivery-tube.

The chamber L' is in communication with the air during the operation of starting the injector by means of the port` J', the passage j', and the waste-pipe E. The port J' is controlled by the gravity check-valve J, which prevents admission of air to the chamber L' and which can be held forcibly to its seat by the cam operated by the lever l.

f is the divergent delivery-tube of the foreing apparatus. y

Referring to Figs. 4, 5, and G, 7.'. is the delivery-tube of the lifting apparatus. K is the delivery-chamber of the lifting apparatus, from which the feed passes by means of the duct K' in the direction of the dotted arrow into the intermediate supply-chamber K", containing the receiving end of the combining-tube d (l of the forcing apparatus.

In the injector shown in Fig. 8 the seat for the automatic valve His form ed by the iianged enlargement G near the forward end of the combining-tube C, which tube terminates at the end of the steam-nozzle n. vll is the automatic valve, concave on its lower side and guided by its cylindrical prolongation h, which slides upon the exteriorsurface of the combining-tube d (l of the forcing apparatus. Then the automatic valve ll rests upon its seat G, it forms the chamber L, inclosing the rearmost lateral opening F of the lifting apparatus, and isolates it from the opening F' of the forcing combining-tube d rl. W'hen the valve H is raised from its seat by an excess of pressure at F, communication between the two openings F and F' is established.

It will be evident that the chamber L, which incloses the rearmost lateral opening of the lifting apparatus, may be formed by attaching the flanged enlargement G to the combining-tube C at the rear of the lateral opening F and providing the automatic valve 1I with a straight flange to cover the open end of this enlargement-that is to say, reverse the arrangement shown in the drawings by attaching the cup to the combining-tube and the straight fiange to the valve.

The operation of the injector is as follows: When steam is admitted to the branch B, the valve b' being closed, it discharges through the lifting-nozzle l) and the lifting combiningtube c, raises the valve II, and enters the chamber L', into which chamber a portion of the steam discharged from c enters through the openings in the combining-tube d d, from which it all escapes to the air by lifting the valve J. After the supply-water arrives at the end of the lifting steam-nozzle D it is continuously delivered by the lifting apparatus to the receiving end of the forcing combining-tube d (l. If the steam-valve b' is now opened to admit steam tothe second apparatus, the water received from the lifting apparatus is forced through the combining-tube (l d and the delivery-tube f of the forcing apparatus into the pipe leadiiig to the boiler.

If the lateral openings of the combiningtubes of the lifting and of the forcing apparatus are suitably located and of sufficient area relative to the areas of their respective actuating steam-j ets the combined apparatus will be able to restart automatically after a temporary interruption of the steam or water supply, provided that the waste-valve J is free to rise from its seat and that the area of its port and of the conjoined outlet-duct permits free discharge of the issuing steam.

lVhen operating with the supply-water at ordinary temperatures, the delivery of the IOO IIO

injector is greatest, and its performance is most etlicient when the lateral openings of both combining-tubes are in communication.

Vhen the temperature of the Water-supply is raised to that at which spill commences to issue from the Waste-pipe E, it is necessar that the gravity-valve J should be held forcibly upon its seat by a partial rotation of the cam j or by other suitable means in order that al1 of the feed-water shall be forced into the boiler feed-pipe. rlhis will produce pressure upon the water in the chamber L', which if it could reach the opening F would interrupt the action of the apparatus. The pressure iu the chamber L will, however, close the valve ll, and thereby prevent this pressure from reaching the opening F. The temperature of the feed-water may then be increased until the pressure in the chamber L reaches a point that will interrupt the action of the injector by pressure upon the jet at the openings F" and F.

XVhat I claim as new in double-jet and double-impulse injectors, and desire to secure by Letters Patent, is-

1. A cl1a1i1be1'wl1ich incloses the rearmost lateral opening to the converging jet of the lifting apparatus, from the chamber which incluses the lateral openings to the converging jet of the forcing apparatus.

2. A chamber which incluses the rear-most lateral opening to the converging jet of the lifting apparatus, from the chamber which incloses the lateral openings to the converging jet of the forcing apparatus, with means for closing the outlet from the chamber which incloses the lateral openings of the forcing apparatus.

3. An outlet through a side of the chamber which incloses the rearmost lateral opening to the converging jet of the lifting apparatus, to the chamber which incloses the lateral openings of the forcing apparatus, which outlet may be closed at will.

4. A valve in the outlet of the chamber which incloses the rearmost lateral opening to the converging jet of the lifting apparatus, which valve opens outwardly under pressure within this chamber, and which closes under pressure Within the chamber which incloses the lateral openings of the forcing apparatus.

STRICKLAND L. KNEASS.

itnessesz J oHN L. PHILLIPS, E. R. HARPER. 

